For many people, the 40-hour work week can be an exhausting grind. It’s switching to a four-day work week. The five-day, 40-hour work week was a hard-fought win for labor activists in the US. In recent years, a growing number of organizations and experts have started campaigning for a four-day work week. During that time, their employees would switch to a four-day work week with no adjustments in pay or benefits.